This will work in Vista, but not sure about 2008, I haven't tried it.
Copy and paste the code into a new file in Notepad, save it as a .reg file then double-click the .reg file. This will add the
Open Command Window Here (Administrator) option to the context menu for file system folders.
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\Directory\shell\runas]
@="Open Command Window Here (Administrator)"
[HKEY_CLASSES_ROOT\Directory\shell\runas\command]
@="cmd.exe /s /k pushd \"%V\""
Dave